If you had to pay say $600-$800 for a phone upfront, one is upgradable/repairable and the other is not (but faster/sexier) I think some (maybe many) would choose the former.
Nope. You just happen to know people who can afford to toss an $800 laptop. For most of the 'lower middle class' people I know purchasing a laptop is a big deal and only happens once every 3/4/5 years. Even then they don't spend more than £400. Even when their laptop is practically unusable through age, damaged parts, viruses etc. they continue to use it because £400/$800/a new laptop is a lot of money.
2-3 years ago I got new sony led tv and my wife was under the impression it would be our TV for the next 10-15 years... if major components don't go out in the next 1-3 years i will be happily suprised
The point is: A barebone model for 50 bucks that you could transform in a high-end device expending more money on it when you can afford it.
Also... need more battery life? Why not replace that extra RAM memory module for battery one? Or even... why not to replace the 4 Gb RAM module for one with 1Gb + more battery?
And they have already acknowledged they plan on having "effort free" choices available for consumers. Probably have a "about the same as a Samsung" option, a cheap option that has the important bells and maybe a minimal option you can build off of.
I can give you bigger and thicker since I would expect those too. Neither is really a problem though. One of the benefits of the otterbox case for my Galaxy G3 is that it made the phone thicker, and it's already on the big side.
Heavier though will probably depend on the modules you choose, and ugly, well I thought what they were showing looked kind of good.
Personally, a lack of a SD card is one of the reasons I didn't get the Nexus or an iPhone. There are people that want these types of features and they win when comparing with alternatives.
There are about 900m Android phones out there. That means if you assume only 10% of the market might be interested in a particular variant of phone, your total addressable market is still 90 million (and growing).
My instinct is that this level of customisation is probably a relatively niche thing but - as outlined above - that doesn't mean that there isn't room for it to be commercially successful.